CVE-2025-21839

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.22% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 12.7% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-07-30.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-03-07 09:09Z1 YR AGO

Last updated

2026-08-05 11:54Z1 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.3)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H

Weaknesses

• CWE-665Improper InitializationClass

Data version

5.2

Document digest

6aa2eb90e77c8b09f37c9d21212f793c6620cb0ce612428d484fb4b504bd5b00

• git.kernel.orghttps://git.kernel.org/stable/c/9efb2b99b96c86664bbdbdd2cdb354ac9627eb20
• git.kernel.orghttps://git.kernel.org/stable/c/93eeb6df1605b3a24f38afdba7ab903ba6b64133
• git.kernel.orghttps://git.kernel.org/stable/c/a1723e9c53fe6431415be19302a56543daf503f5
• git.kernel.orghttps://git.kernel.org/stable/c/4eb063de686bfcdfd03a8c801d1bbe87d2d5eb55
• git.kernel.orghttps://git.kernel.org/stable/c/d456de38d9eb753a4e9fde053c18d4ef8e485339
• git.kernel.orghttps://git.kernel.org/stable/c/c2fee09fc167c74a64adb08656cb993ea475197e
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/08/msg00010.html